Which of the following description about BGP routing selection is wrong?

• A.The route that is unreachable for nexthop is an invalid route and does not participate in the preference.
• B.Non-aggregated routes take precedence over aggregated routes.
• C.See the following entry in the BGP routing table: * 172.16.1.11/32 0.0.0.010 0 ? Indicates that the route is available non-optimal.
• D.In the case of Pref-Val and local_preference equal, if the locally generated route, an IBGP route, the EBGP routes BGP preference consistent, efficient routing priority locally generated is first.

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IPSG can configure static binding table or use DHCP-snooping to form a binding table.

• A.False
• B.True

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Which of the following statement about IPSG technology is correct?

• A.The IPSG can perform binding table matching check on P packets that enter the interface and leave the interface.
• B.ip source check user-bind check-item command to configure based VLAN or interface IP packet checking items, the command have effect on the dynamic and static entries.
• C.If an interface is configured as a DHCP snooping Trust HCP ACK, DHCP NAKHCP, and Offerf packets, other untrusted ports cannot receive these packets.
• D.On the Huawei router, you can configure the IPSG function on the Vlanif.

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Router HW1 and router HW2 are connected to network A and network B respectively. As shown below, if you want to establish an IPsec VPN between router HW1 and router HW2.
Which ACL does the router HW1 need to configure to enable LAN-to-LAN traffic to pass through the encrypted VPN tunnel?

• A.rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255
• B.rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255
• C.rule permit ip source 192.168.1.10 destination 192.168.1.2 0
• D.rule permit ip source 10.1.1.0 0.0.0.255 destination 192.168.1.2 0
• E.rule permit ip source 192.168.1.10 destination 10.1.2.0 0.0.0.255

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Assume that the BGP/MPLS IPv4 VPN of Static routing and OSPF, LDP are configured on the PE to enable the NSF function. Which of the following protocols are required to configure to enable the GR function on the PE? ( Multiple Choice)

• A.Static routing
• B.BGP
• C.MPLS LDP
• D.OSPF

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